Investments at Fair Value - Summary of Investments at Fair Value (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 1,744,507	$ 809,029
Fair Value	1,758,911	808,801
Net Unrealized Gain (Loss)	14,404	(228)
First-lien Debt Investments
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	1,626,744	801,223
Fair Value	1,640,479	800,995
Net Unrealized Gain (Loss)	13,735	(228)
Mezzanine Debt Investments
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	97,081
Fair Value	97,750
Net Unrealized Gain (Loss)	669
Equity and Other Investments
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	20,682	7,806
Fair Value	$ 20,682	$ 7,806